cfq-iosched: More renaming to better represent wl_class and wl_type
Some more renaming. Again making the code uniform w.r.t use of wl_class/class to represent IO class (RT, BE, IDLE) and using wl_type/type to represent subclass (SYNC, SYNC-IDLE, ASYNC). At places this patch shortens the string "workload" to "wl". Renamed "saved_workload" to "saved_wl_type". Renamed "saved_serving_class" to "saved_wl_class". For uniformity with "saved_wl_*" variables, renamed "serving_class" to "serving_wl_class" and renamed "serving_type" to "serving_wl_type". Again, just trying to improve upon code uniformity and improve readability. No functional change. v2: - Restored the usage of keyword "service" based on Jeff Moyer's feedback. Signed-off-by: NVivek Goyal <vgoyal@redhat.com> Signed-off-by: NTejun Heo <tj@kernel.org>
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